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3272. An identity involving Dedekind sums and generalized Kloosterman sums
- Creator:
- Huan, Le, Wang, Jingzhe, and Wang, Tingting
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Dedekind sum, Kloosterman sum, Dirichlet character, analytic method, Gauss sum, and identity
- Language:
- English
- Description:
- The various properties of classical Dedekind sums $S(h, q)$ have been investigated by many authors. For example, Yanni Liu and Wenpeng Zhang: A hybrid mean value related to the Dedekind sums and Kloosterman sums, Acta Mathematica Sinica, 27 (2011), 435–440 studied the hybrid mean value properties involving Dedekind sums and generalized Kloosterman sums $K(m, n, r; q)$. The main purpose of this paper, is using the analytic methods and the properties of character sums, to study the computational problem of one kind of hybrid mean value involving Dedekind sums and generalized Kloosterman sums, and give an interesting identity.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
3273. An identity with generalized derivations on Lie ideals, right ideals and Banach algebras
- Creator:
- de Filippis, Vincenzo, Scudo, Giovanni, and Tammam El-Sayiad, Mohammad S.
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- prime rings, differential identities, generalized derivations, and Banach algebra
- Language:
- English
- Description:
- Let $R$ be a prime ring of characteristic different from $2$, $U$ the Utumi quotient ring of $R$, $C=Z(U)$ the extended centroid of $R$, $L$ a non-central Lie ideal of $R$, $F$ a non-zero generalized derivation of $R$. Suppose that $[F(u),u]F(u)=0$ for all $u\in L$, then one of the following holds: (1) there exists $\alpha \in C$ such that $F(x)=\alpha x$ for all $x\in R$; (2) $R$ satisfies the standard identity $s_4$ and there exist $a\in U$ and $\alpha \in C$ such that $F(x)=ax+xa+\alpha x$ for all $x\in R$. We also extend the result to the one-sided case. Finally, as an application we obtain some range inclusion results of continuous or spectrally bounded generalized derivations on Banach algebras.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
3274. An ignominious defeat? :
- Creator:
- Ligeti, David Adam,
- Type:
- text and studie
- Subject:
- Vojenství. Obrana země. Ozbrojené síly, válka první světová (1914-1918), armáda rakousko-uherská (1867-1918), vojáci maďarští, operace vojenské, Habsburská monarchie, světové dějiny 1914-1918, dějiny vojenství, and Maďarsko
- Language:
- English
- Description:
- Hanebná porážka? - Úloha maďarského jezdectva v prvních měsících první světové války.
- Rights:
- unknown
3275. An immunosuppressed rat model for evaluation of anti-Cryptosporidium activity of sinefungin
- Creator:
- Brasseur, P., Favennec, L., Leméteil, D., Roussel, F., and Ballet, J.J.
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- Cryptosporidium parvum, sinefungin, anti-cryptosporidial drug, rat model, and treatment
- Language:
- English
- Description:
- Cryptosporidium parvum causes life-threatening diarrhoea in immunocompromized, especially AIDS patients and the efficiency of proposed anti-cryptosporidial therapies is limited or doubtful. An immunosuppressed adult rat model of C. parvum infection was developed for screening molecules candidate for curative and preventive activity in human cryptosporidiosis. Among 31 drugs tested, lasalocid (2-10 mg/kg/24 h), and sinefungin (2-10 mg/kg/24 h), exhibited some activity against C. parvum infection. Oral sinefungin therapy resulted in a dose related suppression of oocysts shedding, which correlated with oocyst disappearance from ileum sections and was also efficient in preventing infection. Relapses were observed after discontinuation of curative sinefungin therapy, which suggests that the biliary tract, a major location and parasite reservoir which sustains persisting infection, was not cleared of parasites by the drug. Improved therapeutic procedures with sinefungin (or analogues) will result from current pharmacological studies.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
3276. An Imperial Dream: The "Russification" of Sacral Architecture in the Polish Lands in the 19th Century /
- Creator:
- Paszkiewicz, Piotr
- Subject:
- dějiny architektury, rusifikace, architektura sakrální, světové dějiny 1789-1918, Polsko, and architektura, architekti
- Language:
- English
- Description:
- Imperiální sen. "Rusifikace" sakrální architektury v polských zemích v 19. století.
- Rights:
- unknown
3277. An Imperial Translator at the Comnenian Court /
- Creator:
- Brand, Charles M.
- Type:
- text and studie
- Subject:
- Dějiny Evropy, překladatelé, dvory panovnické, Byzanc, světové dějiny středověku (do r. 1492), and literatura, spisovatelé
- Language:
- English
- Rights:
- unknown
3278. An improved classifier and transliterator of hand-written Palmyrene letters to Latin
- Creator:
- Hamplová, Adéla, Franc, David, and Veselý, Arnošt
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- artificial intelligence, classification, historical alphabets, mobilenet, and computer vision
- Language:
- English
- Description:
- This article presents the problem of improving the classifier of handwritten letters from historical alphabets, using letter classification algorithms and transliterating them to Latin. We apply it on Palmyrene alphabet, which is a complex alphabet with letters, some of which are very similar to each other. We created a mobile application for Palmyrene alphabet that is able to transliterate hand-written letters or letters that are given as photograph images. At first, the core of the application was based on MobileNet, but the classification results were not suitable enough. In this article, we suggest an improved, better performing convolutional neural network architecture for hand-written letter classifier used in our mobile application. Our suggested new convolutional neural network architecture shows an improvement in accuracy from 0.6893 to 0.9821 by 142% for hand-written model in comparison with the original MobileNet. Future plans are to improve the photographic model as well.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
3279. An improved E-model using artificial neural network VoIP quality predictor
- Creator:
- AL-Akhras, Mousa, ALMomani, Iman, and Sleit, Azzam
- Format:
- bez média and svazek
- Type:
- model:article and TEXT
- Subject:
- Voice over IP, artificial neural network, speech quality, E-model, non-intrusive, voiced, unvoiced, perceptual evaluation of speech quality, packet loss, and subjective-free
- Language:
- English
- Description:
- Voice over Internet Protocol (VoIP) networks are an increasingly important field in the world of telecommunication due to many involved advantages and potential revenue. Measuring speech quality in VoIP networks is an important aspect of such networks for legal, commercial and technical reasons. The E-model is a widely used objective approach for measuring the quality as it is applicable to monitoring live-traffic, automatically and non-intrusively. The E-model suffers from several drawbacks. Firstly, it considers the effect of packet loss on the speech quality collectively without looking at the content of the speech signal to check whether the loss occurred in voiced or unvoiced parts of the signal. Secondly, it depends on subjective tests to calibrate its parameters, which makes it applicable to limited conditions corresponding to specific subjective experiments. In this paper, a solution is proposed to overcome these two problems. The proposed solution improves the accuracy of the E-model by differentiating between packet loss during speech and silence periods. It also avoids the need for subjective tests, which makes it extendable to new network conditions. The proposed solution is based on an Artificial Neural Networks (ANN) approach and is compared with the accurate Perceptual Evaluation of Speech Quality (PESQ) model and the original E-model to confirm its accuracy. Several experiments are conducted to test the effectiveness of the proposed solution on two well-known ITU-T speech codecs; namely, G.723.1 and G.729.
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public
3280. An improved lure for trapping the bark beetle Dendroctonus armandi (Coleoptera: Scolytinae)
- Creator:
- Xie, Shou-An and Lv, Shu-Jie
- Type:
- article, články, model:article, and TEXT
- Subject:
- Zoologie, zoologie, entomologie, Coleoptera, Scolytidae, Dendroctonus armandi, semiochemicals, GC-MS and GC-FID, analyses, trap, Pinus armandi, 2, and 59
- Language:
- English
- Description:
- The pine bark beetle, Dendroctonus armandi, is a native pest restricted to forests in the Qinling Mountains in China. There was an outbreak of this species there that affected over 0.36 million hectares of pine forest. We hypothesized that there are differences between the numbers of beetles captured by traps baited with various combinations of candidate semiochemicals extracted from the hindguts of D. armandi. In order to determine whether a better operational lure could be developed for D. armandi, we analyzed the volatiles in extracts of the hindgut of D. armandi and tested various combinations of candidate semiochemicals. The GC-MS and GC-FID analyses of volatiles in the extracts of the hindguts of D. armandi collected at different stages of the attack revealed that they are mainly a-pinene, b-caryophyllene and (+)-3-carene with minor amounts of myrcene, limonene, verbenol and verbenone. We tested various combinations of these candidate semiochemicals in order to determine an optimal blend. Our results suggest that the addition of b-caryophyllene to either a-pinene, or blends of a-pinene and other candidate semiochemicals, significantly enhanced the attractiveness of the lures for D. armandi. Field trapping experiments indicated that the blends that included b-caryophyllene, myrcene and other candidate semiochemicals resulted in significantly higher trap catches (161–243% higher) than a-pinene alone. Therefore, a simple lure consisting of a-pinene and b-caryophyllene would be an optimal blend for D. armandi. We conclude that this blend of semiochemicals may provide a better method of reducing the numbers of D. armandi in forest ecosystem., Shou-An Xie, Shu-Jie LV., and Obsahuje seznam literatury
- Rights:
- http://creativecommons.org/publicdomain/mark/1.0/ and policy:public